---
title: blockAlignment
framework: corevideo
role: symbol
role_heading: Instance Property
path: corevideo/cvpixelformatdescription/pixellayout/blockalignment
---

# blockAlignment

Alignment requirements on block multiples. v210 would be (8, 1) here for the horizontal case, to match the standard v210 row alignment value of 48.

## Declaration

```swift
var blockAlignment: CVPixelFormatDescription.Dimensions
```